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No Shadow of a Doubt

Nonfiction: Science, History
Unabridged   13.75 hour(s)
Publication date: 04/30/2019

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No Shadow of a Doubt

The 1919 Eclipse That Confirmed Einstein's Theory of Relativity

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Audio CD ISBN:9781684571468
Digital Download ISBN:9781684571475


On their 100th anniversary, the story of the extraordinary scientific expeditions that ushered in the era of relativity.

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Product Description

On their 100th anniversary, the story of the extraordinary scientific expeditions that ushered in the era of relativity.

In 1919, British scientists led extraordinary expeditions to Brazil and Africa to test Albert Einstein's revolutionary new theory of general relativity in what became the century's most celebrated scientific experiment. The result ushered in a new era and made Einstein a global celebrity by confirming his dramatic prediction that the path of light rays would be bent by gravity. Today, Einstein's theory is scientific fact. Yet the effort to "weigh light" by measuring the gravitational deflection of starlight during the May 29, 1919, solar eclipse has become clouded by myth and skepticism. Could Arthur Eddington and Frank Dyson have gotten the results they claimed? Did the pacifist Eddington falsify evidence to foster peace after a horrific war by validating the theory of a German antiwar campaigner? In No Shadow of a Doubt, Daniel Kennefick provides definitive answers by offering the most comprehensive and authoritative account of how expedition scientists overcame war, bad weather, and equipment problems to make the experiment a triumphant success.


"The famously disputed 1919 eclipse expedition is an icon for physics and for history, philosophy, and sociology of science. Kennefick's richly detailed, scholarly, and highly readable book is aimed at settling the issues across the board once and for all. If you want to understand what happened and what it means, this is the book you should start with."—Harry Collins, Cardiff University

Author Bio

Daniel Kennefick is associate professor of physics at the University of Arkansas, Fayetteville. He is the author of Traveling at the Speed of Thought: Einstein and the Quest for Gravitational Waves and a coauthor of An Einstein Encyclopedia.